... tree has had a stroke, and its top dies. A redwood can deal with a stroke. It simply grows a new top in a few centuries.

The coast redwood is a so-called relict species. It is a tiny remnant of a life form that once spread in splendor and power across the face of nature. The redwood has settled down in California to live near the sea, the way many retired people do.

The coast redwood is the tallest species of tree on earth. The tallest redwoods today are between 350 and close to 380 feet in height--thirty-five to thirty-eight stories tall. The crown of a tree is its radiant array of limbs and branches, covered with leaves. The crowns of the tallest redwoods can sometimes look like the plume of exhaust from a rocket taking off.

The K-T impact had no evident long-lasting effect on the redwoods. It's possible that, after the impact, the redwoods sprouted up from the remains of their root systems, rising up in fairy rings in a ruined world ...